[turbofan] Disable speculation for JSCall nodes by default

Change-Id: I7360601f4e1b419cf8d35480b068418bdd700be9
Reviewed-on: https://chromium-review.googlesource.com/928649
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51467}

src/compiler/js-operator.cc

@@ -756,6 +756,8 @@ const Operator* JSOperatorBuilder::Call(size_t arity, CallFrequency frequency,
                                         VectorSlotPair const& feedback,
                                         ConvertReceiverMode convert_mode,
                                         SpeculationMode speculation_mode) {
+  DCHECK_IMPLIES(speculation_mode == SpeculationMode::kAllowSpeculation,
+                 feedback.IsValid());
   CallParameters parameters(arity, frequency, feedback, convert_mode,
                             speculation_mode);
   return new (zone()) Operator1<CallParameters>(   // --
@@ -776,6 +778,8 @@ const Operator* JSOperatorBuilder::CallWithArrayLike(CallFrequency frequency) {
 const Operator* JSOperatorBuilder::CallWithSpread(
     uint32_t arity, CallFrequency frequency, VectorSlotPair const& feedback,
     SpeculationMode speculation_mode) {
+  DCHECK_IMPLIES(speculation_mode == SpeculationMode::kAllowSpeculation,
+                 feedback.IsValid());
   CallParameters parameters(arity, frequency, feedback,
                             ConvertReceiverMode::kAny, speculation_mode);
   return new (zone()) Operator1<CallParameters>(             // --

src/compiler/js-operator.h

@@ -677,12 +677,12 @@ class V8_EXPORT_PRIVATE JSOperatorBuilder final
       size_t arity, CallFrequency frequency = CallFrequency(),
       VectorSlotPair const& feedback = VectorSlotPair(),
       ConvertReceiverMode convert_mode = ConvertReceiverMode::kAny,
-      SpeculationMode speculation_mode = SpeculationMode::kAllowSpeculation);
+      SpeculationMode speculation_mode = SpeculationMode::kDisallowSpeculation);
   const Operator* CallWithArrayLike(CallFrequency frequency);
   const Operator* CallWithSpread(
       uint32_t arity, CallFrequency frequency = CallFrequency(),
       VectorSlotPair const& feedback = VectorSlotPair(),
-      SpeculationMode speculation_mode = SpeculationMode::kAllowSpeculation);
+      SpeculationMode speculation_mode = SpeculationMode::kDisallowSpeculation);
   const Operator* CallRuntime(Runtime::FunctionId id);
   const Operator* CallRuntime(Runtime::FunctionId id, size_t arity);
   const Operator* CallRuntime(const Runtime::Function* function, size_t arity);

src/compiler/js-typed-lowering.cc

@@ -1753,7 +1753,7 @@ Reduction JSTypedLowering::ReduceJSCall(Node* node) {
   if (p.convert_mode() != convert_mode) {
     NodeProperties::ChangeOp(
         node, javascript()->Call(p.arity(), p.frequency(), p.feedback(),
-                                 convert_mode));
+                                 convert_mode, p.speculation_mode()));
     return Changed(node);
   }
 

src/feedback-vector.h

@@ -206,8 +206,8 @@ class FeedbackVector : public HeapObject {
 
   FeedbackSlot GetTypeProfileSlot() const;
 
-  static Handle<FeedbackVector> New(Isolate* isolate,
-                                    Handle<SharedFunctionInfo> shared);
+  V8_EXPORT_PRIVATE static Handle<FeedbackVector> New(
+      Isolate* isolate, Handle<SharedFunctionInfo> shared);
 
   static Handle<FeedbackVector> Copy(Isolate* isolate,
                                      Handle<FeedbackVector> vector);
@@ -431,8 +431,8 @@ class FeedbackMetadata : public FixedArray {
   FeedbackSlotKind GetKind(FeedbackSlot slot) const;
 
   // If {spec} is null, then it is considered empty.
-  static Handle<FeedbackMetadata> New(Isolate* isolate,
-                                      const FeedbackVectorSpec* spec = nullptr);
+  V8_EXPORT_PRIVATE static Handle<FeedbackMetadata> New(
+      Isolate* isolate, const FeedbackVectorSpec* spec = nullptr);
 
 #ifdef OBJECT_PRINT
   // For gdb debugging.

test/mjsunit/default-nospec.js

+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --opt --no-always-opt
+
+(()=> {
+  function f(a, b, c) {
+    return String.prototype.indexOf.call(a, b, c);
+  }
+  f("abc", "de", 1);
+  f("abc", "de", 1);
+  %OptimizeFunctionOnNextCall(f);
+  f("abc", "de", {});
+  %OptimizeFunctionOnNextCall(f);
+  f("abc", "de", {});
+  assertOptimized(f);
+})();
+
+(()=> {
+  function f(a, b, c) {
+    return String.prototype.indexOf.apply(a, [b, c]);
+  }
+  f("abc", "de", 1);
+  f("abc", "de", 1);
+  %OptimizeFunctionOnNextCall(f);
+  f("abc", {}, 1);
+  %OptimizeFunctionOnNextCall(f);
+  f("abc", {}, 1);
+  assertOptimized(f);
+})();
+
+(()=> {
+  function f(a, b, c) {
+    return Reflect.apply(String.prototype.indexOf, a, [b, c]);
+  }
+  f("abc", "de", 1);
+  f("abc", "de", 1);
+  %OptimizeFunctionOnNextCall(f);
+  f({}, "de", 1);
+  %OptimizeFunctionOnNextCall(f);
+  f({}, "de", 1);
+  assertOptimized(f);
+})();
+
+(()=> {
+  function f(a, b) {
+    return String.fromCharCode.call(a, b);
+  }
+  f("abc", 1);
+  f("abc", 1);
+  %OptimizeFunctionOnNextCall(f);
+  f("abc", {});
+  %OptimizeFunctionOnNextCall(f);
+  f({}, {});
+  assertOptimized(f);
+})();
+
+(()=> {
+  function f(a, b) {
+    return String.fromCharCode.apply(undefined, [b, {}]);
+  }
+  f("abc", 1);
+  f("abc", 1);
+  %OptimizeFunctionOnNextCall(f);
+  f("abc", {});
+  %OptimizeFunctionOnNextCall(f);
+  f("abc", {});
+  assertOptimized(f);
+})();
+
+
+(()=> {
+  function f(a, b) {
+    return Reflect.apply(String.fromCharCode, a, [b, {}]);
+  }
+  f("abc", 1);
+  f("abc", 1);
+  %OptimizeFunctionOnNextCall(f);
+  f("abc", {});
+  %OptimizeFunctionOnNextCall(f);
+  f("abc", {});
+  assertOptimized(f);
+})();

test/unittests/compiler/js-call-reducer-unittest.cc

@@ -8,6 +8,8 @@
 #include "src/compiler/js-call-reducer.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/simplified-operator.h"
+#include "src/factory.h"
+#include "src/feedback-vector.h"
 #include "src/isolate.h"
 #include "test/unittests/compiler/graph-unittest.h"
 #include "test/unittests/compiler/node-test-utils.h"
@@ -72,6 +74,21 @@ class JSCallReducerTest : public TypedGraphTest {
            string_fnc.substr(1, std::string::npos);
   }
 
+  const Operator* Call(int arity) {
+    FeedbackVectorSpec spec(zone());
+    spec.AddCallICSlot();
+    Handle<FeedbackMetadata> metadata = FeedbackMetadata::New(isolate(), &spec);
+    Handle<SharedFunctionInfo> shared =
+        isolate()->factory()->NewSharedFunctionInfo(
+            isolate()->factory()->empty_string(), MaybeHandle<Code>(), false);
+    shared->set_feedback_metadata(*metadata);
+    Handle<FeedbackVector> vector = FeedbackVector::New(isolate(), shared);
+    VectorSlotPair feedback(vector, FeedbackSlot(0));
+    return javascript()->Call(arity, CallFrequency(), feedback,
+                              ConvertReceiverMode::kAny,
+                              SpeculationMode::kAllowSpeculation);
+  }
+
  private:
   JSOperatorBuilder javascript_;
   CompilationDependencies deps_;
@@ -180,9 +197,8 @@ TEST_F(JSCallReducerTest, MathUnaryWithNumber) {
     Node* frame_state = graph()->start();
     Node* jsfunction = MathFunction(fnc);
     Node* p0 = Parameter(Type::Any(), 0);
-    Node* call =
-        graph()->NewNode(javascript()->Call(3), jsfunction, UndefinedConstant(),
-                         p0, context, frame_state, effect, control);
+    Node* call = graph()->NewNode(Call(3), jsfunction, UndefinedConstant(), p0,
+                                  context, frame_state, effect, control);
     Reduction r = Reduce(call);
     ASSERT_TRUE(r.Changed());
     EXPECT_THAT(std::string(IrOpcode::Mnemonic(r.replacement()->opcode())),
@@ -209,9 +225,8 @@ TEST_F(JSCallReducerTest, MathBinaryWithNumber) {
     Node* frame_state = graph()->start();
     Node* p0 = Parameter(Type::Any(), 0);
     Node* p1 = Parameter(Type::Any(), 0);
-    Node* call =
-        graph()->NewNode(javascript()->Call(4), jsfunction, UndefinedConstant(),
-                         p0, p1, context, frame_state, effect, control);
+    Node* call = graph()->NewNode(Call(4), jsfunction, UndefinedConstant(), p0,
+                                  p1, context, frame_state, effect, control);
     Reduction r = Reduce(call);
 
     ASSERT_TRUE(r.Changed());
@@ -231,9 +246,8 @@ TEST_F(JSCallReducerTest, MathClz32WithUnsigned32) {
   Node* frame_state = graph()->start();
 
   Node* p0 = Parameter(Type::Unsigned32(), 0);
-  Node* call =
-      graph()->NewNode(javascript()->Call(3), jsfunction, UndefinedConstant(),
-                       p0, context, frame_state, effect, control);
+  Node* call = graph()->NewNode(Call(3), jsfunction, UndefinedConstant(), p0,
+                                context, frame_state, effect, control);
   Reduction r = Reduce(call);
 
   ASSERT_TRUE(r.Changed());
@@ -253,9 +267,8 @@ TEST_F(JSCallReducerTest, MathImulWithUnsigned32) {
   Node* frame_state = graph()->start();
   Node* p0 = Parameter(Type::Unsigned32(), 0);
   Node* p1 = Parameter(Type::Unsigned32(), 1);
-  Node* call =
-      graph()->NewNode(javascript()->Call(4), jsfunction, UndefinedConstant(),
-                       p0, p1, context, frame_state, effect, control);
+  Node* call = graph()->NewNode(Call(4), jsfunction, UndefinedConstant(), p0,
+                                p1, context, frame_state, effect, control);
   Reduction r = Reduce(call);
 
   ASSERT_TRUE(r.Changed());
@@ -272,9 +285,8 @@ TEST_F(JSCallReducerTest, MathMinWithNoArguments) {
   Node* control = graph()->start();
   Node* context = UndefinedConstant();
   Node* frame_state = graph()->start();
-  Node* call =
-      graph()->NewNode(javascript()->Call(2), jsfunction, UndefinedConstant(),
-                       context, frame_state, effect, control);
+  Node* call = graph()->NewNode(Call(2), jsfunction, UndefinedConstant(),
+                                context, frame_state, effect, control);
   Reduction r = Reduce(call);
 
   ASSERT_TRUE(r.Changed());
@@ -288,9 +300,8 @@ TEST_F(JSCallReducerTest, MathMinWithNumber) {
   Node* context = UndefinedConstant();
   Node* frame_state = graph()->start();
   Node* p0 = Parameter(Type::Any(), 0);
-  Node* call =
-      graph()->NewNode(javascript()->Call(3), jsfunction, UndefinedConstant(),
-                       p0, context, frame_state, effect, control);
+  Node* call = graph()->NewNode(Call(3), jsfunction, UndefinedConstant(), p0,
+                                context, frame_state, effect, control);
   Reduction r = Reduce(call);
 
   ASSERT_TRUE(r.Changed());
@@ -305,9 +316,8 @@ TEST_F(JSCallReducerTest, MathMinWithTwoArguments) {
   Node* frame_state = graph()->start();
   Node* p0 = Parameter(Type::Any(), 0);
   Node* p1 = Parameter(Type::Any(), 1);
-  Node* call =
-      graph()->NewNode(javascript()->Call(4), jsfunction, UndefinedConstant(),
-                       p0, p1, context, frame_state, effect, control);
+  Node* call = graph()->NewNode(Call(4), jsfunction, UndefinedConstant(), p0,
+                                p1, context, frame_state, effect, control);
   Reduction r = Reduce(call);
 
   ASSERT_TRUE(r.Changed());
@@ -325,9 +335,8 @@ TEST_F(JSCallReducerTest, MathMaxWithNoArguments) {
   Node* control = graph()->start();
   Node* context = UndefinedConstant();
   Node* frame_state = graph()->start();
-  Node* call =
-      graph()->NewNode(javascript()->Call(2), jsfunction, UndefinedConstant(),
-                       context, frame_state, effect, control);
+  Node* call = graph()->NewNode(Call(2), jsfunction, UndefinedConstant(),
+                                context, frame_state, effect, control);
   Reduction r = Reduce(call);
 
   ASSERT_TRUE(r.Changed());
@@ -341,9 +350,8 @@ TEST_F(JSCallReducerTest, MathMaxWithNumber) {
   Node* context = UndefinedConstant();
   Node* frame_state = graph()->start();
   Node* p0 = Parameter(Type::Any(), 0);
-  Node* call =
-      graph()->NewNode(javascript()->Call(3), jsfunction, UndefinedConstant(),
-                       p0, context, frame_state, effect, control);
+  Node* call = graph()->NewNode(Call(3), jsfunction, UndefinedConstant(), p0,
+                                context, frame_state, effect, control);
   Reduction r = Reduce(call);
 
   ASSERT_TRUE(r.Changed());
@@ -359,9 +367,8 @@ TEST_F(JSCallReducerTest, MathMaxWithTwoArguments) {
   Node* frame_state = graph()->start();
   Node* p0 = Parameter(Type::Any(), 0);
   Node* p1 = Parameter(Type::Any(), 1);
-  Node* call =
-      graph()->NewNode(javascript()->Call(4), jsfunction, UndefinedConstant(),
-                       p0, p1, context, frame_state, effect, control);
+  Node* call = graph()->NewNode(Call(4), jsfunction, UndefinedConstant(), p0,
+                                p1, context, frame_state, effect, control);
   Reduction r = Reduce(call);
 
   ASSERT_TRUE(r.Changed());